Fellow Story
Cohen on invasive species riding tsunami debris to US shores
Though the global economy has accelerated the process in recent decades by the sheer volume of ships, most from Asia, entering West Coast ports, the marine invasion has been in full swing since 1869, when the transcontinental railroad brought the first shipment of East Coast oysters packed in seaweed and mud to San Francisco, said Andrew Cohen, director of the Center for Research on Aquatic Bioinvasions in Richmond, Calif. For nearly a century before then, ships sailing up the coast carried barnacles and seaweeds.